Question

When people crack their knuckles or their neck, you might hear a cracking sound. this is due to nitrogen escaping out of blood at the joints?

Answer 1

yes it is true nitrogen escapes

Answer 2

Answer:

"The noise of cracking or popping in our joints is actually nitrogen bubbles bursting in our synovial fluid," says Dr. Klapper. According to Dr. Klapper, synovial fluid lubricates your joints like motor oil in a car's engine, reducing friction and preserving our cartilage.